CN110487111A - A kind of impact type rapid-fire weapon barrel capabilities test experiments method and device - Google Patents

Abstract

The invention discloses an experimental method for testing the barrel performance of an impact-type rapid-fire weapon, which comprises the following steps: 1) making an experimental device according to the technological requirements; 2) placing the barrel of the weapon to be tested on a sample platform, and The heating device is installed together; or the weapon barrel and the heating device are installed together, and the heating device heats the weapon barrel to be tested to the temperature required for the experiment; 3) According to the process requirements, the explosive impact drug box is put on the sample table to explode Shock drug, so that the explosive impact drug burns and explodes around the sample table, so that the weapon barrel is wrapped by the compound burned by the explosive impact drug; 4) Start the pneumatic impact device, and the pneumatic impact device wraps the compound burned by the explosive impact drug 5) According to the technical requirements, when the number of impacts reaches the preset value, the pneumatic impact device stops working.

Description

An experimental method and device for testing the performance of the barrel of an impact-type rapid-fire weapon

technical field

The invention relates to the technical field of material performance testing of a barrel of a shooting weapon, in particular to an experimental method and device for testing the barrel performance of an impact-type rapid-fire weapon.

Background technique

In the research on improving the life of weapons, the research on the life of the barrel has always played an important role, especially the research on the life of the barrel of the large-caliber machine gun and the barrel of the shell is more important. During the shooting process, the inner bore of the barrel bears the high temperature, high pressure, scouring and chemical corrosion of the gunpowder gas in a short period of time, and at the same time resists the extrusion and wear of the projectile guide side. The working environment is very harsh.

Under such complex working conditions, after a certain number of shooting cycles, the inner bore of the barrel will gradually be damaged. It is seriously affected, and in severe cases, it can even directly cause the barrel to rupture, directly threatening the safety of soldiers.

Research shows that thermal ablation wear is a key factor determining the life of rapid-fire gun barrel. Ablation is the loss of material inside the barrel due to high temperature and pressure. When the artillery is fired, the instantaneous heating rate of the gunpowder gas on the thin layer of the inner wall of the gun barrel is as high as 6.5*10 ⁵ ~8*10 ⁵ ℃/s, and the gun barrel is subjected to strong transient periodic thermal shock of the gunpowder gas at a temperature as high as 2500~3200℃ . When the gun is fired continuously, the temperature of the gun barrel rises sharply. When the temperature of the gun barrel is too high, ablation will occur inside the gun barrel. Severe ablation of the gun barrel will directly lead to a decrease in the pressure inside the barrel, a decrease in the initial velocity of the shell and a decrease in shooting accuracy, and the gun barrel will eventually be scrapped. Bullets spiraling in the high-temperature, high-pressure barrel will inevitably have a strong impact and wear on the inside of the barrel, which will accelerate the damage of the barrel.

At present, it is extremely difficult for the staff to evaluate and test the barrel and the life of the barrel. There is no testing equipment in this area at home and abroad, and the engineering can only rely on shooting to test the life of the gun. The life of the barrel is mainly evaluated by two sets of experimental methods of ablation and wear, which not only cause a lot of waste of bullets and shells, but also make it difficult to guarantee the accuracy of the experimental results under the same conditions.

In order to solve the above technical problems, the Chinese patent (application number 201610029981.1) discloses a gun life testing machine, which belongs to the field of testing machines, including a body, a PLC control module located inside the body, and a working machine located outside the body. panel, wherein a display screen, a control module, and a clamp for holding a firearm are respectively arranged on the working panel, and a firing mechanism for pulling the trigger is arranged at the rear end of the working panel; The middle part of the panel is provided with a push-pull device for driving the handle to move left and right, the input end of the PLC control module is connected with the control module, and the output end is respectively connected with the firing mechanism, the push-pull device and the display screen. However, this test method not only wastes a lot of bullets, but also is difficult to guarantee the accuracy and consistency of the experimental results under the same conditions.

Contents of the invention

For the above-mentioned deficiencies that exist in the prior art, the object of the present invention is to provide a kind of impact-type rapid-fire weapon barrel performance test experimental method and device that prolongs the weapon barrel life, from three angles of temperature, ablation, wearing and tearing to barrel material Tests are carried out to greatly improve the accuracy of the test results.

In order to solve the above technical problems, the present invention adopts the following technical solutions:

An experimental method for testing the barrel performance of an impact-type rapid-fire weapon, comprising the following steps:

1) Make the experimental device according to the process requirements;

The experimental device includes a shell, the inner cavity of the shell is provided with a sample table, and on one side of the sample table, an explosive impact drug box is arranged; a weapon barrel is fixed on the sample table; above the sample table, a There is a pneumatic impact device that controls the strength of impacting the barrel of the weapon by adjusting the air supply pressure, and also includes a heating device and an electronic counter that counts the number of impacts of the pneumatic impact device;

2) Place the weapon barrel to be tested on the sample table, and the sample table is installed in conjunction with the heating device; or the weapon barrel is installed in conjunction with the heating device, and the heating device heats the weapon barrel to be tested, and heats it to the laboratory Required temperature;

3) According to the process requirements, the explosive impact drug is put into the sample table through the explosive impact drug box, so that the explosive impact drug burns and explodes around the sample table, so that the weapon barrel is wrapped by the compound after the explosive impact drug burns;

4) Activate the pneumatic impact device, the pneumatic impact device exerts impact force on the barrel of the weapon, and the pneumatic impact device hits the barrel of the weapon at least once;

5) According to the process requirements, when the number of impacts reaches the preset value, the pneumatic impact device stops working.

Further, the heating device includes an electromagnetic induction coil and a heating control device electrically connected to the electromagnetic induction coil, the weapon barrel is placed in the electromagnetic induction coil, and then the heating control device is started to energize the electromagnetic induction coil, so that the electromagnetic induction coil is connected to the weapon barrel. Local heating.

Further, the heating device includes an electromagnetic induction coil and a heating control device electrically connected to the electromagnetic induction coil, the weapon barrel to be tested is placed on the sample table, the sample table is placed in the electromagnetic induction coil, and then the heating control device is started to control the electric current. The magnetic induction coil is energized to heat up the sample stage first, and then heat up the weapon barrel on the sample stage.

Further, the pneumatic impact device includes a time relay, a pneumatic hammer electrically connected to the time relay, and an impact rod connected to the pneumatic hammer. The time relay controls the opening and closing of the solenoid valve on the pneumatic hammer. The magnetic piston breaks away from the inner cavity of the pneumatic hammer under the impact of compressed air, so that the impact bar hits the weapon barrel with the magnetic piston under the impact of compressed air; after the impact, the solenoid valve is closed and the compressed air is discharged from the pneumatic hammer to reset the magnetic piston. , the impact rod leaves the surface of the weapon barrel; the electronic counter counts the number of axial impacts as one, and one impact cycle is completed.

An experimental device for testing the barrel performance of an impact-type rapid-fire weapon, comprising a casing, a through hole is arranged on the top of the casing, a heating control device is arranged on one side of the casing, a sample table is arranged inside the casing, and the An electromagnetic induction coil is set around the sample stage, and the electromagnetic induction coil is electrically connected to the heating control device. The upper surface of the sample stage is provided with a pneumatic impact device, and the pneumatic impact device includes a time relay and a time relay. A pneumatic hammer electrically connected to the relay, the cavity of the pneumatic hammer is provided with a magnetic piston reciprocating along the cavity, the pneumatic hammer is provided with a solenoid valve for controlling the compressed air to impact the magnetic piston, and the magnetic piston is provided with a The impact rod passing through the through hole controls the opening and closing of the solenoid valve on the pneumatic hammer through the time relay, so that the magnetic piston reciprocates in the inner cavity of the pneumatic hammer, and impacts the weapon barrel with the impact rod at intervals. The electromagnetic valve in this solution cooperates with the time relay to achieve the function of controlling the impact interval and impact frequency.

Further, the pneumatic impact device includes an oil-free air compressor, an oil-water separator, and an air compressor air pipe connecting the oil-free air compressor and the oil-water separator, and the oil-water separator communicates with the electromagnetic valve through the air air pipe. This scheme uses an oil-free air compressor to provide sufficient and stable pressure air source to the pneumatic hammer; in addition, because the now polluted air will accelerate the wear of the piston seal and cause the seal to fail, therefore, this scheme uses an oil-water separator to realize the removal of air Impurities in the air to provide clean air for the pneumatic hammer.

Further, the pneumatic hammer is provided with an air inlet, and the inner cavity of the pneumatic hammer is provided with a base plate that is attracted to the magnetic piston, and a notch is provided in the middle of the base plate, and the air is passed through the air intake port through the notch. The machine air pipe is in communication with the solenoid valve, and the notch is facing the magnetic piston.

When the solenoid valve is opened, the compressed air is introduced to the base plate through the air pipe of the air machine through the air inlet and the notch, and the compressed air is aimed at the magnetic piston to apply the air supply pressure, so that when the air supply pressure is greater than the magnetic phase attraction force, the magnetic piston is disengaged, and then With the impact of compressed air and the impact rod's own gravity, it hits the barrel of the weapon downward.

Further, the lower part of the pneumatic hammer is provided with a base in contact with the upper surface of the sample table, the base is hollow, and the impact rod can pass through the base, and an exhaust port is provided on the base. When the solenoid valve is closed, the compressed air in the pneumatic hammer will be discharged through the exhaust port, so that the impact rod will no longer be impacted by the compressed air and will gradually reset.

Further, a piston ring is provided on the top of the magnetic piston, and a return spring is provided between the piston ring and the base, and the return spring is sleeved on the impact rod. The reset of the impact rod is controlled by the return spring, that is, the reset of the magnetic piston is also realized.

Further, the heating control device includes a thermocouple and a PID temperature controller. One end of the thermocouple is connected to the PID temperature controller, and the other end is placed on the surface of the sample stage for real-time monitoring of the temperature of the sample stage.

Compared with the prior art, the present invention has the following beneficial effects:

1. In terms of the device, the present invention uses the impact bar to repeatedly impact the test sample, and tests the barrel material from three angles of temperature, ablation and wear, so that the accuracy of the test results is greatly improved, and at the same time it reduces the The detection steps optimize the experimental equipment, improve work efficiency, and demonstrate the innovative points of the equipment.

2. In terms of cost, the present invention uses this equipment to carry out ablation and wear experiments on gun barrels or gun barrels, which prevents excessive consumption of bullets or artillery due to shooting, reduces the staff and material costs put into experiments, and realizes The purpose of reducing costs and improving results.

3. In terms of environmental protection, the present invention will produce CO, SO ₂ and other harmful substances during the firing of artillery or bullets, which will not only cause certain damage to the human body, but also cause different degrees of pollution to the atmosphere and the environment. It avoids the above shortcomings and reflects the green environmental protection requirements of the equipment.

4. The device of the present invention has the characteristics of miniaturization and light weight, and is very flexible and convenient in the process of transportation and handling.

Description of drawings

Fig. 1 is the structure schematic diagram of the experimental device for testing the performance of the barrel of the impact type rapid-fire weapon of the present invention.

Figure 2 is a schematic diagram of the impact of the impact bar in the experimental device for testing the performance of the barrel of the impact-type rapid-fire weapon.

Fig. 3 is a flow chart of the experimental method for testing the barrel performance of the impact type rapid-fire weapon.

In the figure: time relay 1, electronic counter 2, oil-water separator 3, solenoid valve 4, air compressor air pipe 5, air inlet 6, iron bolt 7, screw 8, base plate 9, piston ring 10, magnetic piston 11, none Oil-air compressor 12, impact rod 13, return spring 14, housing 15, exhaust port 16, explosive impact drug box 17, heating control device 18, impact head 19, sample stage 20, electromagnetic induction coil 21, thermocouple 22. PID temperature controller 23.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

The present embodiment: referring to Fig. 1 and Fig. 2, an experimental device for testing the performance of the barrel of an impact-type rapid-fire weapon includes a casing 15, and a heating control device 18 is arranged on one side of the casing 15, and the heating control device 18 adopts high-frequency induction heating The present embodiment is not limited thereto. The housing 15 is provided with a sample stage 20. The sample stage 20 is made of a ferromagnetic material or a material with high resistivity, so that the heating effect of the sample stage 20 is better during induction heating. An electromagnetic induction coil 21 is sheathed around the sample stage 20 , and the electromagnetic induction coil 21 is electrically connected to the heating control device 18 .

The heating control device 18 includes a thermocouple 22 and a PID temperature controller 23. The thermocouple 22 is selected as an S-type platinum-rhodium thermocouple 22. Because the sample temperature in the test area is high, an accurate temperature can be obtained by using the S-type platinum-rhodium thermocouple 22. value. One end of the thermocouple 22 is connected to the PID temperature controller 23, and the other end is placed on the surface of the sample stage 20 for real-time monitoring of the temperature of the sample stage 20. Then, the sample stage 20 is placed inside the electromagnetic induction coil 21, and then The heating control device 18 continuously outputs high-frequency current to the electromagnetic induction coil 21 to heat the sample stage 20 . In addition, the thermocouple 22 can monitor the temperature of the sample stage 20 in real time, and transmit the temperature signal value to the PID temperature controller 23. After the calculation, the PID temperature controller 23 directly controls the output power of the heating control device 18, so as to achieve control The temperature of sample stage 20.

When the magnetic flux passing through the conductor circuit of the electromagnetic induction coil 21 changes, an induced current will be generated in the circuit, which consumes a part of the energy to do work when flowing in the closed circuit, so that a part of the electric energy is converted into heat energy, so that the temperature of the sample stage 20 increases, and then passes through the The heat transfer of the solid to the sample stage 20 increases the temperature of the weapon barrel. The high-frequency induction heating adopted is to utilize the principle of electromagnetic induction heating to convert electromagnetic energy into thermal energy. In the preferred embodiment, the weapon barrel can adopt various shapes, such as round, block and tubular, etc., and the weapon barrel can adopt Body material, but not limited to.

The upper surface of the sample table 20 is provided with a pneumatic impact device, which includes an oil-free air compressor 12, an oil-water separator 3, a time relay 1, and a pneumatic hammer electrically connected to the time relay 1 arranged in sequence from left to right. It includes an air compressor air pipe 5 communicating with an oil-free air compressor 12 and an oil-water separator 3 . The oil-free air compressor 12 is used to provide sufficient and stable pressure air source to the pneumatic hammer; in addition, since the now polluted air will accelerate the wear of the piston seal and cause the seal to fail, this solution uses the oil-water separator 3 to realize the removal of air Impurities in the air to provide clean air for the pneumatic hammer.

The inner cavity of the pneumatic hammer is provided with a magnetic piston 11 that reciprocates along the inner cavity. In this embodiment, the magnetic piston 11 and the impact rod 13 are integrated, and the pneumatic hammer is provided with a solenoid valve 4 for controlling compressed air to impact the magnetic piston 11. The valve 4 communicates with the oil-water separator 3 through the air pipe of the air machine, and the electromagnetic valve 4 cooperates with the time relay 1 to control the impact interval and impact frequency.

In addition, the electronic counter 2 cooperates with the time relay 1 and is used to record the impact cycle, count once when the power is turned on and off, and keep the count value when the power is turned off. With a setting alarm function, an alarm will be generated when the preset number of cycles is reached; a 12v DC power supply is also provided, and the 12v DC power supply provides power to the solenoid valve 4 and the time relay 1.

The housing 15 is provided with a through hole, and the magnetic piston 11 is provided with an impact rod 13 which can pass through the through hole. The impact part of the impact rod 13 can be cylindrical, conical or pyramidal, and different impacts can be selected for different materials. position, through the time relay 1 to control the opening and closing of the electromagnetic valve 4 in the pneumatic hammer, so that the magnetic piston 11 reciprocates in the inner cavity of the pneumatic hammer, and impacts the barrel of the weapon with the impact rod 13 at intervals. In this embodiment, the magnetic piston 11 Collide with the impact rod 13 into one body barrel material.

The pneumatic hammer is provided with an air inlet 6, and the inner cavity of the pneumatic hammer is provided with a base plate 9 which is attracted to the magnetic piston 11. There is a notch in the middle of the base plate 9, and the notch communicates with the solenoid valve 4 through the air inlet 6 through the air pipe. , the notch is facing the magnetic piston 11.

Production of the pneumatic impact device: connect the oil-free air compressor 12, the oil-water separator 3, the solenoid valve 4 and the air inlet 6 of the pneumatic hammer through the air pipe 5 of the air compressor. Use wires to connect time relay 1, electronic counter 2, 12v DC power supply and solenoid valve 4 in series. The impact interval and impact frequency of the pneumatic hammer are regulated through the time relay 1.

After the electronic counter 2 is connected with the time relay 1, the electronic counter 2 will automatically count once every time the solenoid valve 4 is started and stopped, and the experiment will be stopped after reaching the set number of cycles and an alarm will be given.

The lower part of the pneumatic hammer is provided with a base in contact with the upper surface of the sample table 20. The base is hollow, and the impact rod 13 passes through the base. The base is provided with an exhaust port 16. When the solenoid valve 4 is closed, the pneumatic hammer The compressed air inside will be discharged through the exhaust port 16, so that the impact rod 13 will no longer be impacted by the compressed air, and will gradually reset; the top of the magnetic piston 11 is provided with a piston ring 10, and a return spring is provided between the piston ring 10 and the base , the return spring is sleeved on the impact rod 13, and the return spring controls the return of the impact rod 13, that is, the reset of the magnetic piston 11 is also realized.

When the pneumatic hammer is not fed with compressed air, the magnetic piston 11 is closely fixed on the base plate 9 by means of strong magnetic force. When the solenoid valve 4 is energized, the compressed air flows into the pneumatic hammer, so that the magnetic piston 11 on the pneumatic hammer is gradually increased by the air supply pressure. When the pressure is greater than the magnetic force, the magnetic piston 11 is separated from the base plate 9 at a high speed. The high-speed detachment from the base plate 9 in an instant causes the magnetic piston 11 to be subjected to a strong air supply impact force; then the magnetic piston 11 falling at a high speed drives the impact rod 13 to hit the barrel of the weapon together. When the solenoid valve 4 stops energizing, the compressed air in the inner cavity of the pneumatic hammer is discharged through the exhaust port 16, so the magnetic piston 11 is slowly raised by the return spring and then close to the base plate 9, and is magnetically attached to the base plate 9, and resets to the initial state state. In this way, one impact stroke is completed.

The impact part of the impact rod 13 can be selected from cylindrical, conical and pyramidal shapes, and different impact parts can be selected for different materials.

Referring to Fig. 3, an experimental method for testing the barrel performance of an impact-type rapid-fire weapon comprises the following steps:

1) Make the experimental device according to the process requirements;

Described experimental device comprises housing 15, and the cavity of housing 15 is provided with sample platform 20, and on the side of sample platform 20, is provided with explosive impact medicine box 17; On sample platform 20, weapon barrel is fixed; Above the sample table 20, a pneumatic impact device is arranged to control the strength of impacting the barrel of the weapon by adjusting the air supply pressure, and also includes a heating device and an electronic counter 2 for counting the number of impacts of the pneumatic impact device;

2) Place the weapon barrel to be tested on the sample table 20, and the sample table 20 is installed in conjunction with the heating device; or the weapon barrel is installed in conjunction with the heating device, and the heating device heats the weapon barrel to be tested until it reaches The temperature required for the experiment;

3) According to the process requirements, put the explosive impact drug into the sample platform 20 through the explosive impact drug box 17, so that the explosive impact drug burns and explodes around the sample platform 20, so that the weapon barrel is wrapped by the compound burned by the explosive impact drug;

4) Activate the pneumatic shock device, which exerts an impact force on the barrel of the weapon wrapped in the compound after the explosive shock drug is burned, and the pneumatic shock device hits the barrel of the weapon at least once;

5) According to the process requirements, when the number of impacts reaches the preset value, the pneumatic impact device stops working.

The heating device comprises an electromagnetic induction coil 21 and a heating control device 18 electrically connected with the electromagnetic induction coil 21, the barrel of the weapon is placed in the electromagnetic induction coil 21, and then the heating control device 18 is energized to the electromagnetic induction coil 21, so that the electromagnetic induction coil 21 local heating of the barrel of the weapon.

Or, the heating device includes an electromagnetic induction coil 21 and a heating control device 18 electrically connected to the electromagnetic induction coil 21, and the weapon barrel to be tested is placed on the sample stage 20, and the sample stage 20 is placed in the electromagnetic induction coil 21, and then Start the heating control device 18 to energize the electromagnetic induction coil 21, first heat up the sample stage 20, and then heat the weapon barrel on the sample stage 20 through solid heat conduction.

The pneumatic impact device includes a time relay 1, a pneumatic hammer electrically connected to the time relay 1 and an impact rod 13 connected to the pneumatic hammer. The time relay 1 controls the opening and closing of the solenoid valve 4 on the pneumatic hammer. When the solenoid valve 4 is open , the magnetic piston 11 in the pneumatic hammer breaks away from the inner chamber of the pneumatic hammer under the impact of compressed air, so that the impact rod 13 hits the weapon barrel with the magnetic piston 11 under the impact of compressed air; The discharge from the hammer makes the magnetic piston 11 return to the inner cavity of the pneumatic hammer, and the impact rod 13 leaves the surface of the weapon barrel; the electronic counter 2 counts the number of axial impacts as one, and one impact cycle is completed.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than limit the technical solutions. Those skilled in the art should understand that those who modify or replace the technical solutions of the present invention without departing from the present technology The purpose and scope of the scheme should be included in the scope of the claims of the present invention.

Claims (10)

1. an impact type rapid-fire weapon barrel performance testing experimental method, is characterized in that, comprises the following steps: 1) Make the experimental device according to the process requirements; The experimental device includes a shell, the inner cavity of the shell is provided with a sample table, and on one side of the sample table, an explosive impact drug box is arranged; a weapon barrel is fixed on the sample table; above the sample table, a There is a pneumatic impact device that controls the strength of impacting the barrel of the weapon by adjusting the air supply pressure, and also includes a heating device and an electronic counter that counts the number of impacts of the pneumatic impact device; 2) Place the weapon barrel to be tested on the sample table, and the sample table is installed in conjunction with the heating device; or the weapon barrel is installed in conjunction with the heating device, and the heating device heats the weapon barrel to be tested, and heats it to the laboratory Required temperature; 3) According to the process requirements, the explosive impact drug is put into the sample table through the explosive impact drug box, so that the explosive impact drug burns and explodes around the sample table, so that the weapon barrel is wrapped by the compound after the explosive impact drug burns; 4) Activate the pneumatic impact device, the pneumatic impact device exerts impact force on the barrel of the weapon, and the pneumatic impact device hits the barrel of the weapon at least once; 5) According to the process requirements, when the number of impacts reaches the preset value, the pneumatic impact device stops working. 2. the impact type rapid-fire weapon barrel performance testing experimental method according to claim 1, is characterized in that, heating device comprises electromagnetic induction coil and the heating control device that is electrically connected with electromagnetic induction coil, and weapon barrel is placed in electromagnetic induction coil. In the coil, restart the heating control device to energize the electromagnetic induction coil, so that the electromagnetic induction coil locally heats the barrel of the weapon. 3. the impact type rapid-fire weapon barrel performance test experimental method according to claim 1, is characterized in that, heating device comprises electromagnetic induction coil and the heating control device that is electrically connected with electromagnetic induction coil, the weapon barrel to be tested is placed In the sample table, the sample table is placed in the electromagnetic induction coil, and then the heating control device is started to energize the electromagnetic induction coil, and the sample table is heated first, and then the weapon barrel on the sample table is heated. 4. according to any one of claim 1-3, the impact type rapid-fire weapon barrel performance testing experimental method is characterized in that the pneumatic impact device comprises a time relay, a pneumatic hammer electrically connected with the time relay and a pneumatic hammer connected to each other. The impact rod controls the opening and closing of the solenoid valve on the pneumatic hammer through the time relay. When the solenoid valve is open, the magnetic piston in the pneumatic hammer moves downward under the impact of compressed air, so that the impact rod follows the magnetic piston under the impact of compressed air. Impact the barrel of the weapon; after the impact, the solenoid valve is closed and the compressed air is discharged from the pneumatic hammer, so that the magnetic piston is reset, and the impact rod leaves the surface of the barrel of the weapon; the electronic counter counts the number of axial impacts as one, and one impact cycle is completed. 5. An impact-type rapid-fire weapon barrel performance test experimental device is characterized in that it comprises a housing, the top of the housing is provided with a through hole, one side of the housing is provided with a heating control device, and a heating control device is arranged in the housing. There is a sample table, and the surrounding side of the sample table is covered with an electromagnetic induction coil, the electromagnetic induction coil is electrically connected to the heating control device, and the upper surface of the sample table is provided with a pneumatic impact device, and the pneumatic impact device It includes a time relay and a pneumatic hammer electrically connected to the time relay. The inner cavity of the pneumatic hammer is provided with a magnetic piston reciprocating along the inner cavity. The pneumatic hammer is provided with a solenoid valve for controlling compressed air to impact the magnetic piston. The magnetic piston is provided with an impact rod that can pass through the through hole, and the solenoid valve on the pneumatic hammer is controlled to open and close through the time relay, so that the magnetic piston reciprocates in the inner cavity of the pneumatic hammer and strikes the weapon with the impact rod at intervals body control. 6. The impact type rapid-fire weapon barrel performance test experimental device according to claim 5, wherein the pneumatic impact device also includes an oil-free air compressor, an oil-water separator and is connected with the oil-free air compressor and the oil-water separator The air pipe of the air compressor of the device, and the oil-water separator communicates with the electromagnetic valve through the air pipe of the air machine. 7. The experimental device for testing the performance of the impact type rapid-fire weapon barrel according to claim 6, wherein the pneumatic hammer is provided with an air inlet, and the inner cavity of the pneumatic hammer is provided with a substrate that is attracted to the magnetic piston , the middle part of the base plate is provided with a notch, the notch communicates with the electromagnetic valve through the air pipe through the air inlet, and the notch is facing the magnetic piston. 8. The impact type rapid-fire weapon barrel performance testing experimental device according to claim 7, wherein the pneumatic hammer bottom is provided with a base that contacts the upper surface of the sample table, the base is a hollow structure, and the The impact rod passes through the base, and an exhaust port is arranged on the base. 9. the impact type rapid-fire weapon barrel performance test experimental device according to claim 8, is characterized in that, described magnetic piston top is provided with piston ring, is provided with back-moving spring between described piston ring and described base, so The return spring is sleeved on the impact rod. 10. The impact type rapid-fire weapon barrel performance test experimental device according to claim 5, wherein the heating control device comprises a thermocouple and a PID temperature controller, one end of the thermocouple is connected to the PID temperature controller, and the other end is connected to the PID temperature controller. Placed on the surface of the sample stage, it is used to monitor the temperature of the sample stage in real time.